Commonly "multiverses" are ripped off and taken from many worlds theory which is technically 4d construct, this "construct" is more time-based in quantum science bullshit, but in fiction it's just taken as a 3d universe being a cross section of a 4d structure with infinite 3d universes in it, much in the way they are in lovecraft.

Dimensional (R4 to R11) scaling is a comprehensive way to scale quantitative differences in multiverses and their complexity.

To destroy multiverses would logically make you low or high R4, but supes and Goku have barely achieved that. So they would be low R4.